WO2001082785A2 - Appareil de surveillance optique pour le syndrome de la mort subite du nourrisson - Google Patents

Appareil de surveillance optique pour le syndrome de la mort subite du nourrisson Download PDF

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Publication number
WO2001082785A2
WO2001082785A2 PCT/US2001/014304 US0114304W WO0182785A2 WO 2001082785 A2 WO2001082785 A2 WO 2001082785A2 US 0114304 W US0114304 W US 0114304W WO 0182785 A2 WO0182785 A2 WO 0182785A2
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WO
WIPO (PCT)
Prior art keywords
infant
optical device
light source
radiant energy
group
Prior art date
Application number
PCT/US2001/014304
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English (en)
Other versions
WO2001082785A3 (fr
Inventor
Stephen T. Flock
Kevin S. Marchitto
Original Assignee
Flock Stephen T
Marchitto Kevin S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flock Stephen T, Marchitto Kevin S filed Critical Flock Stephen T
Priority to AU2001261159A priority Critical patent/AU2001261159A1/en
Publication of WO2001082785A2 publication Critical patent/WO2001082785A2/fr
Publication of WO2001082785A3 publication Critical patent/WO2001082785A3/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4806—Sleep evaluation
    • A61B5/4818—Sleep apnoea
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/04—Arrangements of multiple sensors of the same type
    • A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array

Definitions

  • the present invention relates generally to the field of medical devices. More specifically, the present invention relates to an optical monitor for sudden infant death syndrome. Description of the Related Art
  • Sudden Infant Death Syndrome is the sudden and unexpected death of an apparently healthy infant, whose death remains unexplained after further medical investigation such as an autopsy. Sudden Infant Death Syndrome is neither a disease, nor can it be a diagnosis for a living baby [1]. SIDS occurs at a rate of approximately 2 per 1,000 live births in the United States and occurs most often (90%) in under six months of age; of these, 18% were preterm infants [2].
  • Sudden Infant Death Syndrome One of the events that occurs during Sudden Infant Death Syndrome is a period of apnea (stoppage of breathing) during which it may be possible that the infant may b e resuscitated.
  • apnea stoppage of breathing
  • most Sudden Infant Death Syndrome events occur at night when the infant's caregiver is asleep. Since Sudden Infant Death Syndrome is not normally associated with verbal distress, few infants get a chance to be resuscitated.
  • Transthoracic electrical impedance monitors are by far the most frequently applied, have the widest availability in the United States, and are generally efficacious in identifying and alarming on apnea events. With these instruments, however, are some situations where "breaths" are detected during true apneas (false negative) and other cases where apneas are indicated while is breathing (false positive). The former is also a significant concern with impedance monitors thus limiting their usefulness.
  • any monitor that accurately reflects the predisposing condition must consistently be alert and understandable to the care giver.
  • the monitor must be efficacious in recognizing apnea and capable of triggering an alarm for prolonged apnea. Short periods of apnea (15 seconds) may not b e fatal to an infant, but prolonged apnea (20 seconds) is abnormal [2].
  • the monitor must be capable of recognizing its own internal operating functions to assure proper and uninterrupted operation. Ideally, it must be noninvasive and easy to use and understand. Other desirable features would be the capability of collecting and archiving patterns surrounding significant events for later analysis. These could include estimation of tidal volume, the identification of heart rate patterns and variability as well as cardiac arrhythmias.
  • the present invention fulfills this long-standing need and desire in the art.
  • the present invention is directed to devices and/or methods of monitoring sudden infant death syndrome (SIDS).
  • SIDS sudden infant death syndrome
  • a system consisting of a sensitive optical rangefinder which senses the movement of a spot of light, projected onto the sleeping infant.
  • a method and/or system of using a laser the radiant output of which is passed through a diffractive optic whereby a matrix of spots is projected into the crib.
  • the movement of the infant is detectable by monitoring the movement of the image of the spots on a charge-coupled device (CCD).
  • CCD charge-coupled device
  • a light source such as a superluminescent infrared light-emitting diode (LED) can be used rather than a laser.
  • a system for monitoring movement of an infant comprising: a light source which produces radiant energy; an optical device; and an imaging device.
  • a method of monitoring movement of an infant comprising the steps of: producing radiant energy by a light source; coupling said radiant energy into an optical device so as to create a matrix of images; projecting said images into a field of interest; and detecting movement of said infant using an imaging device.
  • Figure 1 is a diagram of the arrangement whereby movements are measured by monitoring the changes in position and intensity of an array of projected circles with a position- sensitive-detector (PSD) or charge-coupled-device (CCD) camera.
  • PSD position- sensitive-detector
  • CCD charge-coupled-device
  • Figure 2 is a diagram of the arrangement whereby movements are measured by the change in reflected light intensity as measured by a photosensitive detector.
  • the present invention provides a device which has the sensitivity to continuously detect extremely small movements associated with infant breathing and heart rate.
  • the present device provides several advantages, including being small, inexpensive, and non-contacting.
  • a system comprising of a sensitive optical rangefinder which senses the movement of a spot of light, projected onto the sleeping infant. By doing so, sudden infant death syndrome can be monitored.
  • the signals are continually monitored and analyzed for false-positive events.
  • a method and/or system of using a laser the radiant output of which is passed through a diffractive optic whereby a matrix of spots is projected into the crib.
  • the movement of the infant is detectable by monitoring the movement of the image of the spots on a charge-coupled device (CCD).
  • CCD charge-coupled device
  • a light source can be used rather than a laser.
  • a superluminescent infrared light-emitting diode (LED), which illuminates the crib and sleeping infant with invisible radiant energy and a sensitive photo-detector can be used, wherein any lack of movement of the infant translates into a static reflected infrared signal.
  • the signals are continually monitored and analyzed for false-positive events.
  • Fuzzy-logic is incorporated into the software in the microprocessor that controls the instrument and analyzes the data.
  • the fuzzy-logic "learns" the typical movement pattern of the infant, thus providing a pattern with which spurious signals can be rejected. If an apnea event is detected, a signal can b e transmitted to a receiver (alarm) positioned in proximity to the care-provider thus alerting them to the fact.
  • the output of the device can be connected to a computer or telephone line where it is electronically transmitted to a monitoring company.
  • the optical device could be configured with a sensitive acoustic sensor.
  • Certain movement of the infant would create some acoustic signal, beyond the signal associated with the rush or air through the oral or nasal cavity.
  • the problem with stand-alone acoustic sensors is that they are sensitive to extraneous environmental noises and so are problematic in that they produce many false-negative signals.
  • the combination of an acoustic monitor with an optical movement monitor, whereby the two signals could be collected simultaneously and compared, would allow for the rejection of false-negative signals and/or false positives.
  • Figure 1 shows one arrangement.
  • radiant energy visible or near- infrared
  • a light source which is optimally a superluminescent infrared-light-emitting diode, but optionally can be a diode laser or incandescent bulb.
  • the radiant energy is coupled into a diffractive optic (or other passive or active optical device) which serves to create a matrix of images which is then projected into the field of interrogation, in part or its entirety.
  • This field for example, could be a baby's crib.
  • Examples of other systems that would be useful are an optoacoustic deflector (see Figure 2), diffraction grating, or array of apertures behind a rotating aperture.
  • the images that make up the projected matrix may be made up various patterns, for example, circles or x's.
  • the projected matrix is then imaged by a device which is sensitive to any movement or intensity change in the images.
  • a charge-coupled-device (CCD) camera could image the entire field.
  • the output of the camera would then be monitored by a computer whereupon the x,y position (in terms of pixels on the CCD) and the intensity of each spot is determined. It is possible to continually monitor the position and intensity of the images on the CCD with appropriate software. If desirable, given the optical transfer properties of the imaging system, it is possible to calibrate movement on the CCD (in pixels) with actual movement (in centimeters) on the baby.
  • the software program has a criteria in terms of average or typical spot movement (in pixels) or intensity changes (digitized electron number) for which it associates normal movement associated with normal respiration.
  • the software can "learn” the typical normal movements of the subject using fuzzy logic. This can then be used to reduce or eliminate false positives and false negatives during the subsequent monitoring.
  • a memory could b e incorporated into the hardware so that a record of the monitoring session could be downloaded at a later time if necessary.
  • the output of the device may be monitored b y transmitting a radio signal to a receiver either locally or at a remote location (typically near the care-giver).
  • the receiver can emit a tone and flash a light thereby alerting the care-giver to the fact that an abnormal cardiac and/ or respiration event is taking place in the baby's crib.
  • the output of the unit can be monitored by a company over a telephone connection or over a connection to the internet through a computer and modem or such.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physiology (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

La présente invention concerne des dispositifs et/ou des procédés de surveillance des mouvements extrêmement petits associés au rythme respiratoire et cardiaque du nourrisson, et donc de vigilance par rapport au syndrome de la mort subite du nourrisson. L'invention concerne plus particulièrement un système destiné surveiller les mouvements d'un nourrisson. Ce système se compose d'une source lumineuse produisant une énergie de rayonnement, d'un dispositif optique, et d'un dispositif d'imagerie. L'invention concerne également un procédé de surveillance des mouvements d'un nourrisson par production d'énergie de rayonnement au moyen d'une source lumineuse, couplage de l'énergie de rayonnement dans un dispositif optique de façon à créer une matrice d'images, projection de ces images dans un champ considéré, et détection des mouvements du nourrisson au moyen d'un appareil d'imagerie.
PCT/US2001/014304 2000-05-03 2001-05-02 Appareil de surveillance optique pour le syndrome de la mort subite du nourrisson WO2001082785A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001261159A AU2001261159A1 (en) 2000-05-03 2001-05-02 An optical monitor for sudden infant death syndrome

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20151000P 2000-05-03 2000-05-03
US60/201,510 2000-05-03

Publications (2)

Publication Number Publication Date
WO2001082785A2 true WO2001082785A2 (fr) 2001-11-08
WO2001082785A3 WO2001082785A3 (fr) 2002-01-24

Family

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Family Applications (1)

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PCT/US2001/014304 WO2001082785A2 (fr) 2000-05-03 2001-05-02 Appareil de surveillance optique pour le syndrome de la mort subite du nourrisson

Country Status (3)

Country Link
US (1) US6492634B2 (fr)
AU (1) AU2001261159A1 (fr)
WO (1) WO2001082785A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1350466A1 (fr) * 2000-12-07 2003-10-08 Keio University Moniteur
US9204824B2 (en) 2008-12-11 2015-12-08 Pneumacare Limited Method and apparatus for monitoring an object

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7176440B2 (en) * 2001-01-19 2007-02-13 Honeywell International Inc. Method and apparatus for detecting objects using structured light patterns
US7035432B2 (en) 2003-07-22 2006-04-25 Ronjo Company Method of monitoring sleeping infant
US20060050930A1 (en) * 2003-07-22 2006-03-09 Ranjo Company Method of monitoring sleeping infant
US7239724B2 (en) * 2003-07-22 2007-07-03 International Business Machines Corporation Security identification system and method
JP3782815B2 (ja) * 2004-02-04 2006-06-07 住友大阪セメント株式会社 呼吸解析装置
US20080077020A1 (en) 2006-09-22 2008-03-27 Bam Labs, Inc. Method and apparatus for monitoring vital signs remotely
MY163578A (en) * 2007-12-12 2017-09-29 Mimos Berhad An automated cot surveillance system
US8752220B2 (en) 2009-07-10 2014-06-17 Hill-Rom Services, Inc. Systems for patient support, monitoring and treatment
US8355822B2 (en) * 2009-12-29 2013-01-15 Masco Corporation Of Indiana Method of controlling a valve
US8408517B2 (en) 2009-12-29 2013-04-02 Masco Corporation Of Indiana Water delivery device
US8614414B2 (en) * 2009-12-29 2013-12-24 Masco Corporation Of Indiana Proximity sensor
EP2380493A1 (fr) * 2010-04-21 2011-10-26 Koninklijke Philips Electronics N.V. Appareil de détection de mouvement respiratoire
WO2012164482A1 (fr) * 2011-05-30 2012-12-06 Koninklijke Philips Electronics N.V. Appareil et procédé pour la détection de la position du corps pendant le sommeil
GB201114406D0 (en) 2011-08-22 2011-10-05 Isis Innovation Remote monitoring of vital signs
US9301710B2 (en) * 2012-06-01 2016-04-05 Xerox Corporation Processing a video for respiration rate estimation
US9572528B1 (en) 2012-08-06 2017-02-21 Los Angeles Biomedical Research Insitute at Harbor-UCLA Medical Center Monitor for SIDS research and prevention
US10085697B1 (en) 2012-08-10 2018-10-02 Mollie Evans Pulse oximeter system
EP2888726B1 (fr) 2012-08-25 2021-08-11 Owlet Baby Care, Inc. Moniteur de surveillance de santé sans fil pour nourrissons
US9277892B2 (en) 2013-07-17 2016-03-08 Xerox Corporation Device for monitoring sleeping individuals
DE102014211063A1 (de) * 2014-06-11 2015-12-17 Siemens Aktiengesellschaft Bildgebendes medizinisches Gerät mit optimierter Bedienung
USD877482S1 (en) 2017-01-30 2020-03-10 Owlet Baby Care, Inc. Infant sock

Citations (5)

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US4350166A (en) * 1980-12-12 1982-09-21 Honeywell Inc. Apnea detector
US5309921A (en) * 1992-02-11 1994-05-10 Spectrum Medical Technologies Apparatus and method for respiratory monitoring
US5386831A (en) * 1994-03-11 1995-02-07 Gluck; Lewis Remote noninvasive patient temperature monitor and warning system
US5800360A (en) * 1992-02-11 1998-09-01 Spectrum Medical Technologies, Inc. Apparatus and method for respiratory monitoring
US6062216A (en) * 1996-12-27 2000-05-16 Children's Medical Center Corporation Sleep apnea detector system

Patent Citations (5)

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US4350166A (en) * 1980-12-12 1982-09-21 Honeywell Inc. Apnea detector
US5309921A (en) * 1992-02-11 1994-05-10 Spectrum Medical Technologies Apparatus and method for respiratory monitoring
US5800360A (en) * 1992-02-11 1998-09-01 Spectrum Medical Technologies, Inc. Apparatus and method for respiratory monitoring
US5386831A (en) * 1994-03-11 1995-02-07 Gluck; Lewis Remote noninvasive patient temperature monitor and warning system
US6062216A (en) * 1996-12-27 2000-05-16 Children's Medical Center Corporation Sleep apnea detector system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1350466A1 (fr) * 2000-12-07 2003-10-08 Keio University Moniteur
EP1350466A4 (fr) * 2000-12-07 2006-05-17 Univ Keio Moniteur
US7431700B2 (en) 2000-12-07 2008-10-07 Keio University Body movement and respiration monitor
US9204824B2 (en) 2008-12-11 2015-12-08 Pneumacare Limited Method and apparatus for monitoring an object

Also Published As

Publication number Publication date
AU2001261159A1 (en) 2001-11-12
US20020030154A1 (en) 2002-03-14
US6492634B2 (en) 2002-12-10
WO2001082785A3 (fr) 2002-01-24

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